you were new to the whole FBI play for hunting, and it made you nervous a lot.

you were fidgeting with your hands as you sat at a table in some random diner, while dean, sitting next to you, was questioning some guy about the victim.

when dean noticed you were nervous and uncomfortable, he immediately took your hand in his, to keep you from fidgeting, trying to distract you from your overwhelming feeling. He stroked your knuckles with his thumb and kept the convo going with the man.